Police hunt suspect in Brussels attacks that killed 30

Death toll climbs to at least 30 in attacks on Brussels airport and metro station.

Hundreds injured in what prosecutors say was a suicide bombing.

Police released pictures of three suspects at the airport, still looking for one.

ISIS has claimed responsibility for the attacks.

Belgium raised its terror alert to its highest level.

A police officer stands guard as people are evacuated from Brussels airport, after explosions rocked the facility in Brussels, Belgium, Tuesday March 22, 2016. AP Photo/Geert Vanden Wijngaert Two explosions occurred at Zaventem Airport and another ripped through the Maelbeek metro station in Brussels on Tuesday morning.

At least 10 people died and around 100 were injured at the airport, and 20 people died and 130 people were injured after the explosion at the Maelbeek metro station, Belgium's Crisis Centre reports.

The Belgian prosecutor's office has confirmed that the three men in this image are suspects in the case, according to the RTBF. The two men dressed in black were reportedly suicide bombers and the man in white is on the run and being sought by police.

"There were two explosions in the departure area, one probably caused by a suicide bomber," Belgium's federal prosecutor said, and the other explosion was believed to have come from a bomb in a suitcase according to a US official, Sky News reports.

According to Belgian broadcaster VRT, police found a Kalashnikov assault rifle next to a dead attacker at Zaventem Airport. An unexploded bomb belt was also reportedly found at the terminal, Sky News reports.

Belgian officials confirmed that the explosions were terrorist attacks and that a criminal investigation was opened, according to CNN.

Reuters "What we feared has happened, we were hit by blind attacks," Belgian Prime Minister Charles Michel said at a news conference. "We know there are many dead, many injured."

"This is the most tragic attack that Belgium has ever known," Michel said at a second news conference on Tuesday. He also addressed the attackers directly: "I want to tell those who chose to be barbaric enemies that we will stay united and stick together. We are prepared to do everything to save our fundamental liberties."

The RTBF reports that raids are currently being conducted in the Jette and Schaerbeek neighborhoods of Brussels and that people suspected of being linked to the attacks are being actively sought, including by street police patrols. According to the Daily Mail, two suspects were arrested about a mile from the Maelbeek station at around 12 p.m. local time.

France's prime minister, Manuel Valls, said France stood in solidarity with Belgium. "We are at war, and have endured for many months now, acts of war in Europe," he said, according to Le Figaro.

Emergency services evacuate a woman after a explosion in a main metro station in Brussels on Tuesday, March 22, 2016. AP Images French President François Hollande also reacted to the attacks, saying that "Terrorists struck Brussels but it was Europe that was targeted," the AP reports.

The explosions at the airport originated near the American Airlines check-in desk at about 8 a.m. local time (3 a.m. EDT), according to Sky News. Smoke was seen rising from the airport and there was also a video on Twitter of people fleeing.

At about 9 a.m. local time, an explosion was reported in the Maelbeek metro station in Brussels, in the heart of Belgium's government district near the European Council and European Parliament buildings.

Evan Lamos, a freelance video and media worker, was on a train heading into Brussels right before the blast at the metro station. "On the Metro between Schuman and Maelbeek. We have just been stopped due to an 'incident on the line'. Can hear soft thudding in distance," he tweeted.

"We felt a blast of air and my ears popped shortly after leaving Schuman station. The Metro stopped immediately," he added. He took this video of the train being evacuated in the dark after the explosion:

"Can still hear soft thudding in the distance," Lamos said, before he was evacuated through a smoke-filled tunnel.

The aftermath of the explosion inside the metro. @alxdm/Twitter/

The blasts come four days after the police in Brussels captured Salah Abdeslam, the main remaining suspect in the Paris attacks in November.

The Belgian news agency Belga reported that shots were fired and that there were shouts in Arabic shortly before the explosion.

"I could feel the building move," he said. "There was also dust and smoke as well. I went towards where the explosion came from and there were people coming out looking very dazed and shocked."

People walk away from Brussels airport after explosions rocked the facility in Brussels, Belgium Tuesday March 22, 2016. AP Images Brussels airport said that all flights for Tuesday and Wednesday had been cancelled. No trains to and from the airport were running.

Security at Paris train stations, metros, and airports has been reinforced, according to AFP. Belgians were warned to stay at home and to not make phone calls, as the network was being saturated with calls.

US President Barack Obama was briefed on the Brussels attacks while on an official visit to Cuba, according to a White House statement. The FBI has begun coordinating with its Belgium counterparts and other US agencies following the blasts, Reuters reports.

RTBF reports that all tunnels in Brussels have been closed and that border controls at the Belgium-Netherlands border are in place. The Belgian Crisis Centre also appealed to the population: "Stay where you are."

The RTBF reports that train stations in Brussels are set up to re-open at 4 p.m. local time.

People are driven away from the scene of explosions at Zaventem airport near Brussels, Belgium, March 22, 2016. REUTERS/Francois Lenoir Nuclear power plants in Doel and Tihange in Belgium have been evacuated with only key staff remaining to operate the facilities. The evacuation is part of a set of safety measures related to the high-security alert in the country, Reuters reports.

According to the AFP, Sunni Islam's leading seat of learning, Al-Azhar, condemned the attacks in Brussels on Tuesday. "Al-Azhar strongly condemns these terrorist attacks. These heinous crimes violate the tolerant teachings of Islam," the Cairo-based organisation said in a statement.

"These acts anger and sadden me at the same time. They are born from barbarism and hatred which do justice to nothing and no one. Brussels, like other cities hit by such terrorist attacks, will stand strong..."